Spectrum DSP M2 User Manual V1.1
Figure 3: Virtual dial: The Spectrum after clicking the TUNE/O button.
• Volume – Click the DSP button centre-left then stroke up and down on the left-side of
the LCD screen.
• AFG – Click the DSP button centre-left then stroke up and down in the middle of the
display to adjust. Click the AGC box to change to BAS, TRB (treble) or AGC speed
(SLO etc), then stroke up and down in the middle of the LCD to adjust.
• RIT – Click the DSP button centre-left then stroke up and down on the right-side of the
screen to adjust RIT (Receiver Incremental Tuning), note that its function may be
changed by clicking the RIT box to adjust the sending speed (in Words Per Minute) in
the CW mode, or to adjust the Microphone or Line-In gain in voice mode, etc.
• Mode – Click the mode box in the center of the LCD to select the operating mode of
the transceiver (CW, USB, LSB, etc.) Clicking this button cycles through the available
modes. Click the button above to select digital modes, such as BPSDK and RTTY.
When “LSB/USB Auto Select” is enabled in the Standard Menu (click MENU to
access), the sideband that is not appropriate for the frequency of operation (e.g. USB
will not be selected below 10 MHz). When menu item “LSB/USB Auto Select” is
enabled, in order to change to AM you must select a mode other than LSB (or USB) –
such as CW – and then press-and-hold the Mode box - AM will then be selected.
• DSP – This button is used to control the DSP audio filter mode. When the DSP keypa
is displayed, pressing-and-holding will turn DSP on/off while preserving the current
settings. A long-click on the DSP mode will also disable it until long-pressed again.
• Filter button – (Middle-left) This button is used to select the audio passband filter of
the receiver. The button cycles through the filter that have been pre-selected in the
Filter Selection menu. The button is disabled when FM mode is selected, but
pressing-and-holding it while transmitting on FM will cause a tone burst to be
generated, if this feature is enabled. Pressing-and-holding this button will force the
selection of bandwidth that are otherwise disabled.
The row of virtual buttons at the bottom of the LCD screen are “soft” buttons, the functions of
which change depending on mode, as indicated on the LCD, and will be discussed in more
detail later in this document.
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